Patents by Inventor Claude Auguste Molleron

Claude Auguste Molleron has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for detecting the presence of signal components of predetermined frequency in multifrequency PCM signal
    Patent number: 4109109
    Abstract: Method and apparatus for detecting the presence of signal components of predetermined frequency, in multifrequency PCM signal, especially in signalling tones. The incoming signal is multiplied by sine and cosine waveforms representing a particular frequency, for each of the frequencies to be detected, the two sets of multiplicands thus derived are summed. If the sum is greater than a reference value, said particular frequency is present in the incoming signal.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: August 22, 1978
    Assignee: Societe Anonyme de Telecommunications
    Inventor: Claude Auguste Molleron